Holder for rolls of sheet material



April 23, 1940. E. wlsE HOLDER FOR ROLLS OF SHEET MATERIAL Filed June 29, 1958 INVENTOR EL MER L. l/l//JE ...llllll h l l u l Patented Apr. 23, 1940 -HOLDER FOR ROLLS OF SHEET MATERIAL Elmer L. Wise, Bridgeport, Conn., lassigner to Underwood Elliott Fisher Company, New York, N. Y., a corporation of Delaware v Application June 29, 193s, serial No. 216,480

1 Claim.

The present invention relates to typewriting machines, adding machines, accounting machines and machines of this general class and more particularly to devices for holding rolls of carbon paper, forms, audit sheets or other work sheets vupon which a record is made '0r by which it is transferred in such kmachines. The principal object of the present inventio is to provide a novel and improved roll holder to which hollow rolls of sheet material may be applied with a minimum expenditure of labor and time and which will hold the rolls securely from displacement longitudinally of the holder during the drawing of the sheet material from the rolls.

Another object of the invention is to provide a roll holder for hollow rolls of sheet material, having a shaft and a friction bar or` pad yieldingly pressed outwardly from the shaft to engage frictionally the roll, in which the yielding pressure of the bar on the roll is substantially uniform longitudinally of the bar.

The invention is illustrated in this application as embodied in a holder for carbon rolls particularly adapted to be applied to the platen frame of a typewriting machine of the Elliott Fisher type. The invention, however, is not limited to a holder constructed for application to such machines but the invention may be embodied in other forms of holders adaptedl to be applied to other machines.

The invention will be clearly understood from the accompanying drawing illustrating the invention in its preferred form and the following detailed description of the construction therein shown.

In the drawing:

Fig. l is a plan view of a portion of the platen frame of a typewriting machine of the Elliott Fisher type with a roll holder embodying the invention, having a roll of sheet material mounted thereon, applied to said frame,

Fig. 2 is a sectional View of a roll holder and roll taken substantially in a plane containing the axis of the holder, and

Fig. 3 is a sectional view of the roll holder and roll taken substantially on the line 3-3 of Fig. 2.

The roll holder embodying the invention as illustrated in this application is particularly intended to support rolls of carbon paper or other sheet material each comprising a hollow core 2, of wood, fibre or suitable composition, having a quantity of sheet material 4 wound thereon. The core 2 is provided with a central passage 6 preferably rectangular in cross section, andextending (o1. 242-72) .l longitudinally therethrough, for the reception of the roll holder.

The roll holder shown in this application comprises a bar or shaft 8, preferably rectangular in cross section, and having a length sufficient to enable the same, when inserted in the passage 6 in the roll, to project some distance beyond the roll at each end.l The shaft is formed Witha tapered .bearing portion .Illat one end for engaging in a correspondingly tapered recess in one side rail i2 of the platen frame of an Elliott Fisher machine. The shaft is formed @at the other end with a central bore I4 in which is mounted, for longitudinal movement, a bearing plunger i8, having a tapered bearing portion l2l) arranged to engage in a correspondingly tapered recess in the other side rail I2 of the platen frame. The plunger I8 is yieldingly pressed outwardly by means of a coiled spring 22y and its outwardmovement is limited by the engagement, with a `shoulder on the plunger, of a pin .24 driven transversely into the bored portion of the shaft 8.

In applying the shaft to the platen frame, the bearing portion of the plunger I8 is inserted in the bearing recess in one side rail I2 of said frame and the plunger is forced'inwardly toward g the central portion of the shaft by force exerted axially of the shaft. The other end of the shaft is then engaged in the bearing recess in the other rail, after which the shaft is releasedA and the coiled spring 22 holds the shaft in position. The shaft may be readily rotated against the" relatively slight friction exerted by the bearing portions of the shaft and plunger I8 against the bearings in the side rails of the platen frame.

For the purpose of holding the roll frictionally in position when applied to the holder, the holder is provided with a bar or pad 26 mounted thereon. This bar is not attached at any point to the shaft but is fioatingly mounted on the shaft 8 and is yieldingly pressed outwardly with 'groove 2l through to the opposite side ofthe shaft.

The bar 28 is yieldingly pressed outwardly by means of coiled springs 32 of substantially equal strength surrounding respectively the studs 28 between thebar and the shaft 8 and the movement of the bar under the action of the coiled springs is limited by heads 34 formed on said studs and arranged to engage shoulders 36 formed on the shaft, the openings 30 in the shaft being counter-sunk to receive the heads of the studs.

The studs 28 and the associated coiled springs 32 are arranged so that the springs exert a substantially uniform pressure on the bar 26 throughout the length thereof. To this end, the studs 28 are spaced uniformly along the bar and the inner stud is located at substantially the center point of the bar. This arrangement locates the two outer studs at substantially uniform distances from the ends of the bar. The studs preferably rlt rather closely in the openings in the shaft so that very little angular movement of the bar with relation to the axis of the shaft is permitted.

In order to facilitate the application of a roll of sheet material to the holder, the ends of the bar 26 are provided with portions 38 inclined with relation to the axis of the shaft or to the length of the bar and preferably formed by bending inwardly the ends of the bar. In applying a roll to the holder, one end portion of the core of the roll is placed over the shaft 8 and engaged with the inclined outer face of one of the inwardly bent portions 3B of the bar 2G and the roll is then forced axially of the holder. The engage ment of the core with said inclined face forces the bar 26 inwardly until the core passes over the body ofthe bar.

The bar 26 has a iiat surface contact with the core of the roll, relatively extended axially of the roll, so that the roll is held firmly from displacement angularly with relation to the bar in a plane containing the axes of the studs 28.

With this roll holder construction, a roll of sheet material may be quickly and easily applied to the holder and will be securely held upon the holder as the sheet material is drawn from the roll. The pressure of the bar or pad 26 upon the core 2 Will securely hold the roll frictionally from longitudinal displacement. The engagement of the shaft 8 and the bar 26 with the opposite fiat surface of the central passage 6 in the core causes the holder to turn with the roll as the sheet material is drawn from the roll.

The roll may be applied to the holder from either end of the holder and its application does not require the removal of or the adjustment of any roll holding devices on the shaft. With the holder detached from the platen frame the roll may be readily removed from the holder when desired merely by exerting sufficient force on the roll axially of the shaft in one direction or the other to overcome the friction of the bar or pad 26. Because of the floating mounting of the bar upon the shaft and because of the arrangement of the studs 28 and the springs 32, a substantially uniform pressure is exerted upon the core of the roll at all points along the axis thereof. The holder is comparatively simple in construction and inexpensive to manufacture and it is not liable to get out of order.

Having explained the nature and object of the invention and having specically described a construction embodying the invention in its preferred form, what is claimed is:

`A holder for hollow rolls of sheet material comprising a shaft, a friction bar for engaging the interior surface of a roll extending longitudinally of the shaft and floatingly supported on the shaft, studs connected to the bar, spaced substantially uniformly longitudinally of the bar and slidingly engaging in the shaft and independent coiled springs surrounding the studs and interposed between the shaft and the bar for yieldingly pressing outwardly the bar with relation to the shaft.

ELMER L. WISE.

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